Journal
FUNGAL GENETICS AND BIOLOGY
Volume 86, Issue -, Pages 1-8Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.fgb.2015.11.005
Keywords
Mating; Sugarcane smut; bE/bW heterodimeric transcriptional factor; Solopathogenic haploid; Fungal pathogenicity
Categories
Funding
- National 973 Program of China [2015CB1506003]
- Guangxi Natural Science Foundation Program [2013GXNSFAA019072]
- Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests [14-045-50-ST-07]
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Sporisorium scitamineum is the causal agent of sugarcane smut, which is one of the most serious constraints to global sugarcane production. S. scitamineum and Ustilago maydis are two closely related smut fungi, that are predicted to harbor similar sexual mating processes/system. To elucidate the molecular basis of sexual mating in S. scitamineum, we identified and deleted the ortholog of mating-specific U. may-dis locus b, in S. scitamineum. The resultant b-deletion mutant was defective in mating and pathogenicity in S. scitamineum. Furthermore, a functional b locus heterodimer could trigger filamentous growth without mating in S. scitamineum, and functionally replace the b locus in U. maydis in terms of triggering aerial filament production and forming solopathogenic strains, which do not require sexual mating prior to pathogenicity on the host plants. (C) 2015 The Authors. Published by Elsevier Inc.
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